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Polar RCX3

Weakness:Missing some functions and compatibility with non-Polar accessories.

Running is noticeably more comfortable with the Polar RCX3 because of its sleek design and remote GPS pod. It offers a wide array of features, especially when paired with the GPS sensor, although it is missing altitude, navigation and power-display functions. While the numbers can be tough to see on the smaller screen during training, helpful icons tell what data you’re looking at.

Rock it:For something fully functional when you need it, sleek and slim when you don’t.